Location · California
Clinical trials recruiting in California
1898 recruiting studies have at least one site in California; 701 accept healthy volunteers. Studies that need a specific condition are included too, so check each listing.
Want the research companies that run paid Phase 1 studies for healthy volunteers? Paid clinical trial companies in California.
1,898 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
More recruiting studies (pay not posted)
- Recruiting
A Real World Study of eCoin for Urgency Urinary Incontinence: Post Approval Evaluation (RECIPE)
Valencia Technologies Corporation
- Location
- Irvine, CA + 18 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
Strategy for Improving Stroke Treatment Response
Translational Sciences, Inc.
- Location
- La Jolla, CA + 37 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Evaluate the Safety and Effectiveness of Upadacitinib Tablets in Adult and Adolescent Participants With Severe Alopecia Areata
AbbVie
- Location
- Fountain Valley, CA + 29 other US sites
- Eligibility basics
- Ages 12–63
- RecruitingPhase 2/Phase 3
ACP-204 in Adults With Alzheimer's Disease Psychosis
ACADIA Pharmaceuticals Inc.
- Location
- Costa Mesa, CA + 34 other US sites
- Eligibility basics
- Ages 55–95
- RecruitingPhase 3
A Study to Test the Efficacy and Safety of Riliprubart Against the Usual Treatment of Intravenous Immunoglobulin (IVIg) in People With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)
Sanofi
- Location
- Los Angeles, CA + 31 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 1/Phase 2
RESET-MG: A Study to Evaluate the Safety and Efficacy of CABA-201 in Participants With Generalized Myasthenia Gravis
Cabaletta Bio
- Location
- Orange, CA + 16 other US sites
- Eligibility basics
- Ages 18–70
- RecruitingPhase 2
A Study to Evaluate the Efficacy and Safety of Frexalimab, Brivekimig, or Rilzabrutinib in Participants Aged 16 to 75 Years With Primary Focal Segmental Glomerulosclerosis or Minimal Change Disease
Sanofi
- Location
- Orange, CA + 16 other US sites
- Eligibility basics
- Ages 16–75
- Recruiting
Bronchoscopic RElease of Air Trapped in Hyperinflated Emphysematous Lung - Study 3
Apreo Health, Inc.
- Location
- Sacramento, CA + 17 other US sites
- Eligibility basics
- Ages 40–84
- RecruitingPhase 1
A Study to Investigate Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of AZD5492 in Adult Participants With Systemic Lupus Erythematosus or Idiopathic Inflammatory Myopathies or Rheumatoid Arthritis.
AstraZeneca
- Location
- La Jolla, CA + 2 other US sites
- Eligibility basics
- Ages 18–70
- RecruitingPhase 3
Phase 3 Study of LUM-201 in Children With Growth Hormone Deficiency
Lumos Pharma
- Location
- Madera, CA + 30 other US sites
- Eligibility basics
- Ages 3–11
- RecruitingPhase 2/Phase 3
Phase 2/3 Study of Participants With Recurrent Pericarditis Evaluating the Efficacy and Safety of KPL-387
Kiniksa Pharmaceuticals International, plc
- Location
- La Jolla, CA + 29 other US sites
- Eligibility basics
- Ages 18–80
- RecruitingPhase 3
An Open Label Clinical Study to Evaluate Tanruprubart (Also Commonly Known as ANX005) in Participants With Guillain-Barré Syndrome (FORWARD Study)
Annexon, Inc.
- Location
- Carlsbad, CA + 19 other US sites
- Eligibility basics
- Ages 8–85
- RecruitingPhase 3
Screening Study to Determine Individuals With Potential Trial Eligibility for Alzheimer's Disease Studies
Hoffmann-La Roche
- Location
- Imperial, CA + 67 other US sites
- Eligibility basics
- Ages 50–90
- RecruitingPhase 3
Efficacy, Safety, and Tolerability Study of Lunsekimig Compared With Placebo in Adult Participants With Inadequately Controlled Chronic Obstructive Pulmonary Disease (COPD) Characterized by an Eosinophilic Phenotype
Sanofi
- Location
- La Palma, CA + 72 other US sites
- Eligibility basics
- Ages 40–80
- RecruitingPhase 4
A Study to Evaluate the Effect of KarXT on Urological Safety
Bristol-Myers Squibb
- Location
- Bellflower, CA + 12 other US sites
- Eligibility basics
- Ages 18–65
- RecruitingPhase 3
A Study to Investigate the Efficacy and Safety of Fitusiran Prophylaxis in Male Participants Aged 1 to Less Than 12 Years With Hemophilia A or B
Sanofi
- Location
- Los Angeles, CA + 9 other US sites
- Eligibility basics
- Ages 1–11 · Men only
- Recruiting
Pivotal Study of the SUpira System in Patients Undergoing High-Risk Percutaneous COronaRy InTervention (HRPCI)
Supira Medical
- Location
- Loma Linda, CA + 24 other US sites
- Eligibility basics
- Ages 18–90
- Recruiting
Conquer-AF Protocol for Redo Ablation Procedures in Recurrent Paroxysmal and Persistent Atrial Fibrillation Using the Sphere-9 Catheter and Affera Ablation System (Conquer-AF)
Medtronic Cardiac Ablation Solutions
- Location
- Los Angeles, CA + 20 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 1
Study of KITE-363 in Participants With Autoimmune Neurologic Diseases That Did Not Respond to Usual Treatment
Kite, A Gilead Company
- Location
- Newport Beach, CA + 4 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 3
A Phase 3 Trial to Compare IV BCV Versus IV CDV for Treatment of Adenovirus Infection After Allo-HCT
SymBio Pharmaceuticals
- Location
- Duarte, CA + 24 other US sites
- Eligibility basics
- Ages 2 mo+
- RecruitingPhase 3
A Double-blind, Randomized Controlled Trial to Investigate the Efficacy, Safety, and Pharmacokinetics of Pegloticase Administration Via Subcutaneous and Intravenous Routes Both With Methotrexate in Participants With…
Amgen
- Location
- Anaheim, CA + 73 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Phase 3 Study of Telitacicept in Active Primary Sjögren's Disease
Vor Biopharma
- Location
- Beverly Hills, CA + 46 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 2
Study to Evaluate HM15275 in Subjects With Type 2 Diabetes Mellitus
Hanmi Pharmaceutical Company Limited
- Location
- Santa Clarita, CA + 19 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 3
An Open-label Study of NNZ-2591 in Pediatric Participants With Phelan-McDermid Syndrome
Neuren Pharmaceuticals Limited
- Location
- Glendale, CA + 10 other US sites
- Eligibility basics
- Ages 3–12